How long is to long for a proposal

So I've heard a year and then I've hear 4 years. If your with someone and you both love one another and know you want to spend the rest of your life with them, then how long should you wait to propose? I was with this guys for 4 year and nothing like this has ever gotten brought up. Thank the lord I found out his true colors. The guy I'm with now is great, we love one another dearly and I just had a miscarriage, he cried with me. We weren't TTC but he told me last he wants too now! We've been together for almost a year April 11. I don't want to just sit around playing house you know. I want to get married, I want a family of my own. I don't want him to be like the last and it be 4 years down the road and nothing, no proposal no nothing. How do I bring it up that his the man of my dreams, he's the one I want to marry and have a family with? We've talked about marriage before but in the future. So I know he'd marry me I just don't wanna wait. I don't mean rush it but I would love to at least know that it could possibly happen next summer  or something? What do I do? Is it to early? Should I wait? Please give me your opinion